Four-wheel drive axle

Abstract

The utility model discloses a four-wheel drive axle which comprises a differential axle assembly, a left tail end speed reduction assembly and a right tail end speed reduction assembly. The left tail end speed reduction assembly comprises a front axle left half shaft shell, a left half shaft shell bearing seat, a left tail end shell, a left front side speed reduction shell bearing seat, a left rear side speed reduction shell bearing seat, a left half shaft and a left tail end low-speed driving gear. The left tail end speed reduction assembly and the right tail end speed reduction assembly are arranged in a bilateral symmetry mode. The left tail end shell extends forwards and backwards from the top end to form a left tail end shell front half part and a left tail end shell rear half part. A left rear first tail end low-speed driven gear, a left rear first driven gear shaft, a left rear second tail end low-speed gear, a left rear second driven gear shaft and a left rear third tail end low-speed gear are arranged in the left tail end shell rear half part. And the front half part and the internal structure of the left tail end shell and the rear half part and the internal structure of the left tail end shell are symmetrically arranged front and back. And the left front output shaft and the left rear output shaft are respectively arranged on the left front side reduction shell bearing seat and the left rear side reduction shell bearing seat.

Description

Technical Field

[0001] The utility model relates to a four-wheel drive axle, belonging to the technical field of agricultural machinery. Background Art

[0002] The drive axle is an important structural component of agricultural machinery. In the existing drive axle, a drive wheel is connected to each side. When facing complex terrain and road conditions, the frictional grip is insufficient, the passability is poor, and the two wheels have the same horizontal height, making it even more difficult to pass through complex terrain. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a four-wheel drive axle to solve the deficiencies that the structure of the existing drive axle can only connect two drive wheels and the horizontal heights of the drive wheels are the same.

[0004] The technical solution adopted to solve the above technical problem is: a four-wheel drive axle, including a primary reduction axle assembly, a left end reduction assembly, and a right end reduction assembly; the primary reduction axle assembly includes a differential axle assembly with a closed brake; the left end reduction assembly includes a front axle left half shaft housing, a left half shaft housing bearing seat, a left end housing, a left front reduction housing bearing seat, a left rear reduction housing bearing seat, a left half shaft, and a left end low-speed driving gear; the right end reduction assembly includes a front axle right half shaft housing, a right half shaft housing bearing seat, a right end housing, a right front reduction housing bearing seat, a right rear reduction housing bearing seat, a right half shaft, and a right end low-speed driving gear; the left end reduction assembly and the right end reduction assembly are symmetrically arranged left and right.

[0005] The left end housing is in an inverted V shape and is located on the left side of the differential assembly. The left end housing extends forward and backward from the top to form a front half part and a rear half part of the left end housing. The left front reduction housing bearing seat is vertically fixed at the leftmost bottom of the front half part of the left end housing, and the left rear reduction housing bearing seat is vertically fixed at the leftmost bottom of the rear half part of the left end housing; the front axle left half shaft housing and the left half shaft housing bearing seat are arranged between the left end housing and the differential assembly; the left half shaft housing bearing seat is fixed on the right side of the left end housing, the front axle left half shaft housing is fixed on the left side of the differential assembly, the front axle left half shaft housing extends into the left half shaft housing bearing seat, and a first bearing is arranged between the front axle left half shaft housing and the left half shaft housing bearing seat; one end of the left half shaft is connected to the differential assembly, and the other end passes through the front axle left half shaft housing and extends into the left end housing; a second bearing is arranged between the left half shaft and the left end housing; the part of the left half shaft extending into the left end housing is fixed with a left end low-speed driving gear.

[0006] In the rear half of the left end housing, there are a left rear first end low-speed passive gear, a left rear first passive gear shaft, a left rear second end low-speed passive gear, a left rear second passive gear shaft, and a left rear third end low-speed passive gear. The left end low-speed active gear meshes with the left rear first end low-speed passive gear. The left rear first end low-speed passive gear is fixed on the left rear first passive gear shaft, and a third bearing is provided between the left rear first passive gear shaft and the left end housing. The left rear first end low-speed passive gear meshes with the left rear second end low-speed passive gear. The left rear second end low-speed passive gear is fixed on the left rear second passive gear shaft, and a fourth bearing is provided between the left rear second passive gear shaft and the left end housing. The left rear second end low-speed passive gear meshes with the left rear third end low-speed passive gear. The left rear third end low-speed passive gear is fixed on the left rear output shaft. The front half of the left end housing and its internal structure are symmetrically arranged with the rear half of the left end housing and its internal structure in the front and rear directions.

[0007] A part of the left rear output shaft is located inside the left end housing, and the other part passes through and extends out of the left rear reduction housing bearing seat. A fifth bearing is provided between the left rear output shaft and the rear half of the left end housing, and a sixth bearing is provided between the left rear output shaft and the left rear reduction housing bearing seat.

[0008] The left front reduction housing bearing seat and the left rear reduction housing bearing seat are symmetrically arranged in the front and rear directions. The left rear output shaft and the left front output shaft are symmetrically arranged in the front and rear directions.

[0009] The traditional agricultural machinery drive axle is two-wheel drive, with a driving wheel arranged on each of the left and right sides. This application is four-wheel drive, with two driving wheels arranged on each side, and a total of four driving wheels on both sides. A first bearing is provided between the left front half axle housing and the left half axle housing bearing seat. The left half axle housing bearing seat is not fixedly connected to the left front half axle housing, and the left half axle housing bearing seat can rotate around the left front half axle housing. The left half axle housing bearing seat is fixed on the left end housing, and the left front half axle housing is fixed on the differential assembly, that is, the left half axle housing bearing seat drives the left end housing to rotate around the left front half axle housing. The combination of the above two technical features increases the driving wheels, that is, increases the contact area with the ground and increases the friction force. The left half axle housing bearing seat drives the left end housing to rotate around the left front half axle housing, so that the two driving wheels on the same side can be at different horizontal heights, enabling the agricultural machinery equipped with this application to adapt to various complex terrains. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of this application;

[0011] Figure 2 It is Figure 1 A - A sectional view;

[0012] Figure 3 It is Figure 2 B - B sectional view;

[0013] Figure 4 is Figure 2 a C-C cross-sectional view.

[0014] Explanation of the reference numerals in the drawings: differential axle assembly 1, left front axle half shaft housing 2, left half shaft housing bearing seat 3, left end housing 4, left rear output shaft 5, left rear side reduction housing bearing seat 6, left half shaft 7, left rear first end low-speed driven gear 8, left rear second end low-speed driven gear 9, left rear third end low-speed driven gear 10, left rear first driven gear shaft 11, left rear second driven gear shaft 12, left end low-speed driving gear 13, first bearing 14, second bearing 15, third bearing 16, fourth bearing 17, fifth bearing 18, sixth bearing 19, seventh bearing 20, upper side bearing gland 21, left rear first outer end bearing gland 22, left rear second outer end bearing gland 23, left rear inner end bearing gland 24, output bearing gland 25. Specific implementation mode

[0015] As Figures 1-4 shown, a four-wheel drive axle includes a first-stage reduction axle assembly, a left end reduction assembly, and a right end reduction assembly; the first-stage reduction axle assembly includes a differential axle assembly 1 with a closed brake; the left end reduction assembly includes a left front axle half shaft housing 2, a left half shaft housing bearing seat 3, a left front axle half shaft housing fixing seat 26, a left end housing 4, a left front side reduction housing bearing seat, a left rear side reduction housing bearing seat 6, a left half shaft 7, and a left end low-speed driving gear 13; the right end reduction assembly includes a right front axle half shaft housing, a right half shaft housing bearing seat, a right front axle half shaft housing fixing seat 26, a right end housing, a right front side reduction housing bearing seat, a right rear side reduction housing bearing seat, a right half shaft, and a right end low-speed driving gear. The left end reduction assembly and the right end reduction assembly are symmetrically arranged left and right;

[0016] As Figures 1-4As shown, the left end housing 4 is in an inverted V shape and is located on the left side of the differential assembly. The left end housing 4 extends forward and backward from the top to form the front half of the left end housing 4 and the rear half of the left end housing 4 respectively. The left front reduction housing bearing seat is vertically fixed to the leftmost bottom of the front half of the left end housing 4, and the left rear reduction housing bearing seat 6 is vertically fixed to the leftmost bottom of the rear half of the left end housing 4. The front axle left half shaft housing 2, the left half shaft housing bearing seat 3, and the front axle left half shaft housing fixing seat 26 are arranged between the left end housing 4 and the differential assembly. The left half shaft housing bearing seat 3 is fixed to the right side of the left end housing 4 by bolts. The front axle left half shaft housing fixing seat 26 and the front axle left half shaft housing 2 are fixed to the left side of the differential assembly by bolts. The front axle left half shaft housing 2 extends into the left half shaft housing bearing seat 3, and the front axle left half shaft housing 2 is surrounded and wrapped inside the left half shaft housing bearing seat 3. The left half shaft housing bearing seat 3 extends into the front axle left half shaft housing fixing seat 26, and the left half shaft housing bearing seat 3 is surrounded and wrapped inside the front axle left half shaft housing fixing seat 26. The diameter of the part of the left half shaft housing bearing seat 3 extending into the front axle left half shaft housing fixing seat 26 is larger than the diameter of the opening of the front axle left half shaft housing fixing seat 26. A first bearing 14 is arranged between the front axle left half shaft housing 2 and the left half shaft housing bearing seat 3. There are 2 first bearings 14, which are tapered roller bearings. One end of the left half shaft is connected to the differential assembly, and the other end passes through the front axle left half shaft housing 2 and extends into the left end housing 4. A second bearing 15 is arranged between the left half shaft and the left end housing 4. There are 2 second bearings 15, which are deep groove ball bearings. An upper bearing gland 21 is arranged on the left side of the left end housing 4 corresponding to the second bearing 15. A left end low-speed driving gear is fixed to the part of the left half shaft extending into the left end housing 4, and the left end low-speed driving gear is located between the two second bearings 15.

[0017] As Figures 1-4 shown, a left rear first end low-speed driven gear 8, a left rear second end low-speed driven gear 9, a left rear third end low-speed driven gear 10, a left rear first driven gear shaft 11, and a left rear second driven gear shaft 12 are arranged inside the rear half of the left end housing 4. A left front first end low-speed driven gear, a left front second end low-speed driven gear, a left front third end low-speed driven gear, a left front first driven gear shaft, and a left front second driven gear shaft are arranged inside the front half of the left end housing 4. The front half of the left end housing 4 and its internal structure are symmetrically arranged with the rear half of the left end housing 4 and its internal structure front and back.

[0018] As Figures 1-4As shown in the figure, the left end low-speed driving gear 13 meshes with the left front first end low-speed driven gear and the left rear first end low-speed driven gear 8 respectively; the left rear first end low-speed driven gear 8 is fixed on the left rear first driven gear shaft 11, and there are two third bearings 16 between the left rear first driven gear shaft 11 and the left end housing 4. The third bearings 16 are cylindrical roller bearings. The left rear first end low-speed driven gear 8 is located between the two third bearings 16. At the left side of the left end housing 4 corresponding to the third bearings 16, there is a left rear first outer end bearing gland 22, and at the right side corresponding to the third bearings 16 is the left half shaft housing bearing seat 3; the left rear first end low-speed driven gear 8 meshes with the left rear second end low-speed driven gear 9, and the left rear second end low-speed driven gear 9 is fixed on the left rear second driven gear shaft 12. There are two fourth bearings 17 between the left rear second driven gear shaft 12 and the left end housing 4. The fourth bearings 17 are cylindrical roller bearings. The left rear second end low-speed driven gear 9 is located between the two fourth bearings 17. At the left side of the left end housing 4 corresponding to the fourth bearings 17, there is a left rear second outer end bearing gland 23, and at the right side of the left end housing 4 corresponding to the fourth bearings 17, there is a left rear inner end bearing gland 24; the left rear second end low-speed driven gear 9 meshes with the left rear third end low-speed driven gear 10, and the left rear third end low-speed driven gear 10 is fixed on the left rear output shaft 5.

[0019] As Figures 1-4 shown, a part of the left rear output shaft 5 is located inside the rear half of the left end housing 4, and the other part passes through and extends out of the left rear reduction housing bearing seat 6; there are a fifth bearing 18 and a sixth bearing 19 between the left rear output shaft 5 and the rear half of the left end housing 4. There is one fifth bearing 18, which is a deep groove ball bearing, and there is one sixth bearing 19, which is a tapered roller bearing. At the right side of the left end housing 4 corresponding to the fifth bearing 18, there is an output bearing gland 25; there is a seventh bearing 20 between the left rear output shaft 5 and the left rear reduction housing bearing seat 6. There is one seventh bearing 20, which is a tapered roller bearing;

[0020] As Figures 1-4 shown, the left front reduction housing bearing seat and the left rear reduction housing bearing seat 6 are symmetrically arranged front and back; the left rear output shaft 5 and the left front output shaft are symmetrically arranged front and back. The left rear output shaft 5 and the left front output shaft can be respectively connected to drive wheels.

[0021] Operating conditions of this application: Taking the left end deceleration assembly as an example, start the differential assembly, drive the left half shaft 7 to rotate, the left half shaft 7 drives the left end low-speed driving gear 13 to rotate, the left end low-speed driving gear 13 drives the left front first end low-speed driven gear and the left rear first end low-speed driven gear 8 to rotate respectively, the left front first end low-speed driven gear drives the left front second end low-speed driven gear shaft to rotate, the left front second end low-speed driven gear drives the left front third end low-speed driven gear to rotate, and the left front third end low-speed driven gear drives the left front output shaft to rotate; the left rear first end low-speed driven gear 8 drives the left rear second end low-speed driven gear 9 to rotate, the left rear second end low-speed driven gear shaft 9 drives the left rear third end low-speed driven gear 10 to rotate, and the left rear third end low-speed driven gear 10 drives the left rear output shaft 5 to rotate. The left front output shaft and the left rear output shaft 5 drive the left front driving wheel and the left rear driving wheel to rotate respectively, that is, on one side of the left end deceleration assembly, it is possible to drive two wheels to rotate simultaneously. A first bearing 14 is provided between the left half shaft housing 2 of the front axle and the left half shaft housing bearing seat 3. The left half shaft housing 2 of the front axle and the left half shaft housing bearing seat 3 are in bearing fit and are not fixedly connected. The left half shaft housing bearing seat 3 can rotate around the left half shaft housing 2 of the front axle. The left half shaft housing bearing seat 3 is fixed on the left end housing. Therefore, when the left half shaft housing bearing seat 3 rotates around the left half shaft housing 2 of the front axle, it simultaneously drives the left end housing 4 to rotate around the left half shaft housing 2 of the front axle. The left front driving wheel and the left rear driving wheel are installed on the left end housing, and the left front driving wheel and the left rear driving wheel rotate with the left end housing around the left half shaft housing 2 of the front axle. That is, when the horizontal positions of the left half shaft housing 2 of the front axle and the differential assembly remain unchanged, the left front driving wheel and the left rear driving wheel can adapt to the terrain and are at different horizontal heights. The operating conditions of the right end deceleration assembly are the same as those of the left end deceleration assembly.

Claims

1. A four-wheel drive axle, comprising a primary reduction axle assembly, a left end reduction axle assembly, and a right end reduction axle assembly; the primary reduction axle assembly comprises a differential axle assembly (1) with a closed brake; characterized in that: The left end reduction assembly comprises a front axle left half-shaft housing (2), a left half-shaft housing bearing seat (3), a left end housing (4), a left front reduction housing bearing seat, a left rear reduction housing bearing seat (6), a left half-shaft (7), and a left end low-speed driving gear (13); the right end reduction assembly comprises a front axle right half-shaft housing, a right half-shaft housing bearing seat, a right end housing, a right front reduction housing bearing seat, a right rear reduction housing bearing seat, a right half-shaft, and a right end low-speed driving gear; the left end reduction assembly and the right end reduction assembly are arranged symmetrically on the left and right sides; the left end housing (4) is an inverted V-shape and is located on the left side of the differential assembly; the left end housing (4) extends from the top to the front and rear to form a front half of the left end housing (4) and a rear half of the left end housing (4); the left front reduction housing bearing seat is vertically fixed to the left side of the bottom of the front half of the left end housing (4); the left rear reduction housing bearing seat ( 6) is vertically fixed to the left side of the lowermost rear half of the left end housing (4); the front axle left half-shaft housing (2) and the left half-shaft housing bearing seat (3) are arranged between the left end housing (4) and the differential assembly; the left half-shaft housing bearing seat (3) is fixed to the right side of the left end housing (4), the front axle left half-shaft housing (2) is fixed to the left side of the differential assembly, the front axle left half-shaft housing (2) extends into the left half-shaft housing bearing seat (3), and a first bearing (14) is arranged between the front axle left half-shaft housing (2) and the left half-shaft housing bearing seat (3); one end of the left half-shaft (7) is connected to the differential assembly, and the other end passes through the front axle left half-shaft housing (2) and extends into the left end housing (4); a second bearing (15) is arranged between the left half-shaft (7) and the left end housing (4); a left end low-speed driving gear (13) is fixed to the portion of the left half-shaft (7) extending into the left end housing (4).

2. A four-wheel drive axle as claimed in claim 1, characterized in that: The rear half of the left end housing (4) is provided with a left rear first end low-speed passive gear (8), a left rear first passive gear shaft (11), a left rear second end low-speed passive gear (9), a left rear second passive gear shaft (12), and a left rear third end low-speed passive gear (10); the left end low-speed driving gear (13) is meshed with the left rear first end low-speed passive gear (8); the left rear first end low-speed passive gear (8) is fixed on the left rear first passive gear shaft (11), and a third bearing (16) is provided between the left rear first passive gear shaft (11) and the left end housing (4); the left rear first ... end low-speed passive gear The high-speed passive gear (8) meshes with the left rear second low-speed passive gear (9), the left rear second low-speed passive gear (9) is fixed on the left rear second passive gear shaft (12), and a fourth bearing (17) is provided between the left rear second passive gear shaft (12) and the left end housing (4); the left rear second low-speed passive gear (9) meshes with the left rear third low-speed passive gear (10), and the left rear third low-speed passive gear (10) is fixed on the left rear output shaft (5); the front half of the left end housing (4) and its internal structure are symmetrically arranged with the rear half of the left end housing (4) and its internal structure.

3. A four-wheel drive axle as claimed in claim 2, characterized in that: A portion of the left rear output shaft (5) is located in the rear half of the left end housing (4), and the other portion passes through and extends out of the left rear reduction housing bearing seat (6); a fifth bearing (18) and a sixth bearing (19) are arranged between the left rear output shaft (5) and the rear half of the left end housing (4), and a seventh bearing (20) is arranged between the left rear output shaft (5) and the left rear reduction housing bearing seat (6); the left front reduction housing bearing seat and the left rear reduction housing bearing seat (6) are arranged symmetrically in front and back; the left rear output shaft (5) and the left front output shaft are arranged symmetrically in front and back.

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